The ACT T1S-B05 Mod-Twin 225 HD Rigid Street Clutch Kit is engineered for high-powered AWD street and street/strip applications requiring high torque capacity, quick shifting, durability, and consistent engagement. This heavy-duty twin-disc clutch combines twice the organic friction surfaces with a rigid Mono-Drive hub in a completely modular design.

The Mod-Twin 225 HD Rigid Street Kit provides easy pedal feel, smooth but positive engagement, and quick shifting. Each diaphragm spring undergoes an exclusive four-stage heat-treating process for consistent performance and durability. Steel-backed friction plates with high-quality organic friction materials provide a stable friction coefficient, good heat capacity, and long clutch life.

The friction plates uniformly transfer torque to a chrome-moly Mono-Drive hub that is heat treated for strength and durability. The rigid hub design extends input shaft life through one continuous spline while the lightweight construction allows quicker shifts and trouble-free service.

The kit includes a CNC-machined and dynamically balanced flywheel, pressure plate cover, diaphragm spring, face, puck-style ceramic friction plates, rigid Mono-Drive hub, floater, patented Monoloc Collar, release bearing, alignment tool, and pilot bearing if needed.

ACT Mod-Twin clutches are fully rebuildable, and most components can be ordered separately, providing long-term serviceability for high-performance applications.

Features and Benefits

• Twin-disc Mod-Twin design with twice the organic friction surfaces
• Heavy-duty 225 mm clutch configuration
• 690 ft-lbs. torque capacity
• 125% greater torque capacity than OE
• Rigid Mono-Drive hub for high-performance applications
• Heat-treated chrome-moly hub for strength and durability
• One continuous spline design helps extend input shaft life
• Lightweight rigid design supports quicker shifting
• Steel-backed friction plates with high-quality organic friction material
• Stable friction coefficient and high heat capacity
• Exclusive four-stage heat-treated diaphragm spring
• CNC-machined and dynamically balanced flywheel
• Patented Monoloc Collar
• Fully rebuildable modular design
• Most components can be ordered separately
• 100% clamp-load tested
• Balanced and SFI certified
• Designed for Street or Street/Strip use

Driving Feel

The ACT Mod-Twin 225 HD Rigid Street Clutch provides soft progressive engagement, light pedal effort, and smooth shifting, with moderate to increased transmission gear noise.

Durability and Service Life

The forged aluminum cover, Mono-Drive hub, exclusive diaphragm, premium friction materials, and hardened wear points are designed to ensure this long-life twin-disc clutch performs and survives under demanding conditions.

Quality

ACT delivers high performance and heat tolerance by combining robust engineering, strategic design features, carefully selected materials, and close manufacturing tolerances.

ACT Difference

Applying tactical engineering to the Mod-Twin, ACT presents unique solutions to common tradeoffs found on twin-disc clutches. The result is an ultra-durable, customer-serviceable, long-lasting clutch with very high torque capacity. All ACT Mod-Twin clutches are 100% clamp-load tested, balanced, and SFI certified.

Specifications

• Item Description: ACT Mod-Twin 225 Heavy Duty Rigid Street Clutch Kit
• Part Number: T1S-B05
• Product Weight: 33.1 lbs.
• Torque Capacity: 690 ft-lbs.
• Torque Capacity Over OE: 125%
• Disc Material: Organic
• Clutch Disc Diameter: 8.8 inches / 225 mm
• Input Shaft Diameter: 1.375 inches
• Pressure Plate Type: Heavy Duty
• Warranty: 12 Months
• SFI: 1.2
• UPC: 00842385031138

Fitment

This clutch is designed for select 2007-2016 BMW applications equipped with 3.0L turbocharged inline-six engines, including N54/N55 applications. Verify the exact vehicle, drivetrain, transmission, engine, and application before ordering.

U.S. Fitment

• 2007 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2007 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2007 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2007 BMW 335xi Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 135i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 135i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 335xi Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 335xi Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 535i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 535xi Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2008 BMW 535xi Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 135i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 135i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 335i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 335i xDrive Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 335i xDrive Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 535i Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 535i xDrive Base — 3.0 L6 GAS FI 2979cc | DOHC
• 2009 BMW 535i xDrive Base — 3.0 L6 GAS FI 2979cc | DOHC

European Fitment

• 2009 BMW 135i E82 [Euro] — 3.0L I6 FI | T
• 2009 BMW 135i E88 [Euro] — 3.0L I6 FI | T
• 2010 BMW 135i E82 [Euro] — 3.0L I6 FI | T
• 2010 BMW 135i E88 [Euro] — 3.0L I6 FI | T
• 2011 BMW 135i E82 [Euro] — 3.0L I6 FI | T
• 2011 BMW 135i E88 [Euro] — 3.0L I6 FI | T
• 2012 BMW 135i E82 [Euro] — 3.0L I6 FI | T
• 2012 BMW 135i E88 [Euro] — 3.0L I6 FI | T
• 2013 BMW 135i E82 [Euro] — 3.0L I6 FI | T
• 2013 BMW 135i E88 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335i E90 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2010 BMW 335i E90 [Euro] — 3.0L I6 FI | T
• 2010 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2010 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335xi E90 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335xi E92 [Euro] — 3.0L I6 FI | T
• 2010 BMW 335xi E90 [Euro] — 3.0L I6 FI | T
• 2010 BMW 335xi E92 [Euro] — 3.0L I6 FI | T
• 2011 BMW 335i E90 [Euro] — 3.0L I6 FI | T
• 2011 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2011 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2012 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2012 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2013 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2013 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2011 BMW 335xi E90 [Euro] — 3.0L I6 FI | T
• 2011 BMW 335xi E92 [Euro] — 3.0L I6 FI | T
• 2012 BMW 335xi E92 [Euro] — 3.0L I6 FI | T
• 2013 BMW 335xi E92 [Euro] — 3.0L I6 FI | T
• 2012 BMW 335i F30 [Euro] — 3.0L I6 FI | T
• 2013 BMW 335i F30 [Euro] — 3.0L I6 FI | T
• 2014 BMW 335i F30 [Euro] — 3.0L I6 FI | T
• 2015 BMW 335i F30 [Euro] — 3.0L I6 FI | T
• 2012 BMW 335iX F30 [Euro] — 3.0L I6 FI | T
• 2013 BMW 335iX F30 [Euro] — 3.0L I6 FI | T
• 2014 BMW 335iX F30 [Euro] — 3.0L I6 FI | T
• 2015 BMW 335iX F30 [Euro] — 3.0L I6 FI | T
• 2014 BMW 435i F32 [Euro] — 3.0L I6 FI | T
• 2015 BMW 435i F32 [Euro] — 3.0L I6 FI | T
• 2016 BMW 435i F32 [Euro] — 3.0L I6 FI | T
• 2014 BMW 435iX F32 [Euro] — 3.0L I6 FI | T
• 2015 BMW 435iX F32 [Euro] — 3.0L I6 FI | T
• 2016 BMW 435iX F32 [Euro] — 3.0L I6 FI | T
• 2011 BMW 535i F10 [Euro] — 3.0L I6 FI | T
• 2012 BMW 535i F10 [Euro] — 3.0L I6 FI | T
• 2013 BMW 535i F10 [Euro] — 3.0L I6 FI | T
• 2014 BMW 535i F10 [Euro] — 3.0L I6 FI | T
• 2015 BMW 535i F10 [Euro] — 3.0L I6 FI | T
• 2016 BMW 535i F10 [Euro] — 3.0L I6 FI | T
• 2014 BMW M235i F22 [Euro] — 3.0L I6 FI | T
• 2014 BMW M235i F23 [Euro] — 3.0L I6 FI | T
• 2015 BMW M235i F22 [Euro] — 3.0L I6 FI | T
• 2015 BMW M235i F23 [Euro] — 3.0L I6 FI | T
• 2016 BMW M235i F22 [Euro] — 3.0L I6 FI | T
• 2016 BMW M235i F23 [Euro] — 3.0L I6 FI | T
• 2009 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2010 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2011 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2012 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2013 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2014 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2015 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2016 BMW Z4 35i E89 [Euro] — 3.0L I6 FI | T
• 2007 BMW 335i E90 [Euro] — 3.0L I6 FI | T
• 2008 BMW 335i E90 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335i E90 [Euro] — 3.0L I6 FI | T
• 2007 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2008 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335i E92 [Euro] — 3.0L I6 FI | T
• 2007 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2008 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2009 BMW 335i E93 [Euro] — 3.0L I6 FI | T
• 2007 BMW 335xi E90 [Euro] — 3.0L I6 FI | T
• 2008 BMW 335xi E90 [Euro] — 3.0L I6 FI | T
• 2007 BMW 335xi E92 [Euro] — 3.0L I6 FI | T
• 2008 BMW 335xi E92 [Euro] — 3.0L I6 FI | T